Agreeing to play lots of math games. Maybe you can alternate a math lesson day with a math game day. Their intro. to multiplication is skip counting. He already skip counts by 2, 5, &10, right? So now they are trying to master by 3 & 4. 6-9 are conceptual at first and you could just help him more with those. Otherwise they are working on subtraction mastery (play more math games) and some geometry with shapes and measuring perimeter. We are at lesson 60 of level C.